[PATCH 1/3] OMAP: DSS2: Add generic DPI panel display driver
Bryan Wu
bryan.wu at canonical.com
Wed Nov 17 08:34:33 EST 2010
Generic DPI panel driver includes the driver and 4 similar panel configurations. It
will match the panel name which is passed from platform data and setup the
right configurations.
With generic DPI panel driver, we can remove those 4 duplicated panel display
drivers. In the future, it is simple for us just add new panel configuration
date in panel-generic-dpi.c to support new display panel.
Signed-off-by: Bryan Wu <bryan.wu at canonical.com>
---
.../arm/plat-omap/include/plat/panel-generic-dpi.h | 37 ++
drivers/video/omap2/displays/Kconfig | 8 +
drivers/video/omap2/displays/Makefile | 1 +
drivers/video/omap2/displays/panel-generic-dpi.c | 355 ++++++++++++++++++++
4 files changed, 401 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/plat-omap/include/plat/panel-generic-dpi.h
create mode 100644 drivers/video/omap2/displays/panel-generic-dpi.c
diff --git a/arch/arm/plat-omap/include/plat/panel-generic-dpi.h b/arch/arm/plat-omap/include/plat/panel-generic-dpi.h
new file mode 100644
index 0000000..7906197
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/panel-generic-dpi.h
@@ -0,0 +1,37 @@
+/*
+ * Header for generic DPI panel driver
+ *
+ * Copyright (C) 2010 Canonical Ltd.
+ * Author: Bryan Wu <bryan.wu at canonical.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ARCH_ARM_PLAT_OMAP_PANEL_GENERIC_DPI_H
+#define __ARCH_ARM_PLAT_OMAP_PANEL_GENERIC_DPI_H
+
+#include "display.h"
+
+/**
+ * struct panel_generic_dpi_data - panel driver configuration data
+ * @name: panel name
+ * @platform_enable: platform specific panel enable function
+ * @platform_disable: platform specific panel disable function
+ */
+struct panel_generic_dpi_data {
+ const char *name;
+ int (*platform_enable)(struct omap_dss_device *dssdev);
+ void (*platform_disable)(struct omap_dss_device *dssdev);
+};
+
+#endif /* __ARCH_ARM_PLAT_OMAP_PANEL_GENERIC_DPI_H */
diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig
index 12327bb..cb3e339 100644
--- a/drivers/video/omap2/displays/Kconfig
+++ b/drivers/video/omap2/displays/Kconfig
@@ -1,6 +1,14 @@
menu "OMAP2/3 Display Device Drivers"
depends on OMAP2_DSS
+config PANEL_GENERIC_DPI
+ tristate "Generic DPI Panel"
+ help
+ Generic DPI panel driver.
+ Supports DVI output for Beagle and OMAP3 SDP.
+ Supports LCD Panel used in TI SDP3430 and EVM boards,
+ OMAP3517 EVM boards and CM-T35.
+
config PANEL_GENERIC
tristate "Generic Panel"
help
diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile
index aa38609..022058c 100644
--- a/drivers/video/omap2/displays/Makefile
+++ b/drivers/video/omap2/displays/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_PANEL_GENERIC_DPI) += panel-generic-dpi.o
obj-$(CONFIG_PANEL_GENERIC) += panel-generic.o
obj-$(CONFIG_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o
obj-$(CONFIG_PANEL_SHARP_LQ043T1DG01) += panel-sharp-lq043t1dg01.o
diff --git a/drivers/video/omap2/displays/panel-generic-dpi.c b/drivers/video/omap2/displays/panel-generic-dpi.c
new file mode 100644
index 0000000..6702cf6
--- /dev/null
+++ b/drivers/video/omap2/displays/panel-generic-dpi.c
@@ -0,0 +1,355 @@
+/*
+ * Generic DPI Panels support
+ *
+ * Copyright (C) 2010 Canonical Ltd.
+ * Author: Bryan Wu <bryan.wu at canonical.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen at nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <plat/panel-generic-dpi.h>
+
+struct panel_config {
+ struct omap_video_timings timings;
+
+ int acbi; /* ac-bias pin transitions per interrupt */
+ /* Unit: line clocks */
+ int acb; /* ac-bias pin frequency */
+
+ enum omap_panel_config config;
+
+ int power_on_delay;
+ int power_off_delay;
+
+ /*
+ * Used to match device to panel configuration
+ * when use generic panel driver
+ */
+ const char *name;
+};
+
+/* Panel configurations */
+static struct panel_config generic_dpi_panels[] = {
+ /* Generic Panel */
+ {
+ {
+ .x_res = 640,
+ .y_res = 480,
+
+ .pixel_clock = 23500,
+
+ .hfp = 48,
+ .hsw = 32,
+ .hbp = 80,
+
+ .vfp = 3,
+ .vsw = 4,
+ .vbp = 7,
+ },
+ .acbi = 0x0,
+ .acb = 0x0,
+ .config = OMAP_DSS_LCD_TFT,
+ .power_on_delay = 0,
+ .power_off_delay = 0,
+ .name = "generic",
+ },
+
+ /* Sharp LQ043T1DG01 */
+ {
+ {
+ .x_res = 480,
+ .y_res = 272,
+
+ .pixel_clock = 9000,
+
+ .hsw = 42,
+ .hfp = 3,
+ .hbp = 2,
+
+ .vsw = 11,
+ .vfp = 3,
+ .vbp = 2,
+ },
+ .acbi = 0x0,
+ .acb = 0x0,
+ .config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+ OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IEO,
+ .power_on_delay = 50,
+ .power_off_delay = 100,
+ .name = "sharp_lq",
+ },
+
+ /* Sharp LS037V7DW01 */
+ {
+ {
+ .x_res = 480,
+ .y_res = 640,
+
+ .pixel_clock = 19200,
+
+ .hsw = 2,
+ .hfp = 1,
+ .hbp = 28,
+
+ .vsw = 1,
+ .vfp = 1,
+ .vbp = 1,
+ },
+ .acbi = 0x0,
+ .acb = 0x28,
+ .config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+ OMAP_DSS_LCD_IHS,
+ .power_on_delay = 50,
+ .power_off_delay = 100,
+ .name = "sharp_ls",
+ },
+
+ /* Toppoly TDO35S */
+ {
+ {
+ .x_res = 480,
+ .y_res = 640,
+
+ .pixel_clock = 26000,
+
+ .hfp = 104,
+ .hsw = 8,
+ .hbp = 8,
+
+ .vfp = 4,
+ .vsw = 2,
+ .vbp = 2,
+ },
+ .acbi = 0x0,
+ .acb = 0x0,
+ .config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+ OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IPC |
+ OMAP_DSS_LCD_ONOFF,
+ .power_on_delay = 0,
+ .power_off_delay = 0,
+ .name = "toppoly_tdo35s",
+ },
+};
+
+struct panel_drv_data {
+
+ struct omap_dss_device *dssdev;
+
+ struct panel_config *panel_config;
+};
+
+static inline struct panel_generic_dpi_data
+*get_panel_data(const struct omap_dss_device *dssdev)
+{
+ return (struct panel_generic_dpi_data *) dssdev->data;
+}
+
+static int generic_dpi_panel_power_on(struct omap_dss_device *dssdev)
+{
+ int r;
+ struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
+ struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+ struct panel_config *panel_config = drv_data->panel_config;
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+ return 0;
+
+ r = omapdss_dpi_display_enable(dssdev);
+ if (r)
+ goto err0;
+
+ /* wait couple of vsyncs until enabling the LCD */
+ if (panel_config->power_on_delay)
+ msleep(panel_config->power_on_delay);
+
+ if (panel_data->platform_enable) {
+ r = panel_data->platform_enable(dssdev);
+ if (r)
+ goto err1;
+ }
+
+ return 0;
+err1:
+ omapdss_dpi_display_disable(dssdev);
+err0:
+ return r;
+}
+
+static void generic_dpi_panel_power_off(struct omap_dss_device *dssdev)
+{
+ struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
+ struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+ struct panel_config *panel_config = drv_data->panel_config;
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ return;
+
+ if (panel_data->platform_disable)
+ panel_data->platform_disable(dssdev);
+
+ /* wait couple of vsyncs after disabling the LCD */
+ if (panel_config->power_off_delay)
+ msleep(panel_config->power_off_delay);
+
+ omapdss_dpi_display_disable(dssdev);
+}
+
+static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
+{
+ struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
+ struct panel_config *panel_config = NULL;
+ struct panel_drv_data *drv_data = NULL;
+ int i;
+
+ dev_dbg(&dssdev->dev, "probe\n");
+
+ if (!panel_data || !panel_data->name)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(generic_dpi_panels); i++) {
+ if (strcmp(panel_data->name, generic_dpi_panels[i].name) == 0) {
+ panel_config = &generic_dpi_panels[i];
+ break;
+ }
+ }
+
+ if (!panel_config)
+ return -EINVAL;
+
+ dssdev->panel.config = panel_config->config;
+ dssdev->panel.timings = panel_config->timings;
+ dssdev->panel.acb = panel_config->acb;
+ dssdev->panel.acbi = panel_config->acbi;
+
+ drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
+ if (!drv_data)
+ return -ENOMEM;
+
+ drv_data->dssdev = dssdev;
+ drv_data->panel_config = panel_config;
+
+ dev_set_drvdata(&dssdev->dev, drv_data);
+
+ return 0;
+}
+
+static void generic_dpi_panel_remove(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+
+ dev_dbg(&dssdev->dev, "remove\n");
+
+ kfree(drv_data);
+
+ dev_set_drvdata(&dssdev->dev, NULL);
+}
+
+static int generic_dpi_panel_enable(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+
+ r = generic_dpi_panel_power_on(dssdev);
+ if (r)
+ return r;
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ return 0;
+}
+
+static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
+{
+ generic_dpi_panel_power_off(dssdev);
+
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static int generic_dpi_panel_suspend(struct omap_dss_device *dssdev)
+{
+ generic_dpi_panel_power_off(dssdev);
+
+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
+ return 0;
+}
+
+static int generic_dpi_panel_resume(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+
+ r = generic_dpi_panel_power_on(dssdev);
+ if (r)
+ return r;
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ return 0;
+}
+
+static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ dpi_set_timings(dssdev, timings);
+}
+
+static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ *timings = dssdev->panel.timings;
+}
+
+static int generic_dpi_panel_check_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ return dpi_check_timings(dssdev, timings);
+}
+
+static struct omap_dss_driver dpi_driver = {
+ .probe = generic_dpi_panel_probe,
+ .remove = generic_dpi_panel_remove,
+
+ .enable = generic_dpi_panel_enable,
+ .disable = generic_dpi_panel_disable,
+ .suspend = generic_dpi_panel_suspend,
+ .resume = generic_dpi_panel_resume,
+
+ .set_timings = generic_dpi_panel_set_timings,
+ .get_timings = generic_dpi_panel_get_timings,
+ .check_timings = generic_dpi_panel_check_timings,
+
+ .driver = {
+ .name = "generic_dpi_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init generic_dpi_panel_drv_init(void)
+{
+ return omap_dss_register_driver(&dpi_driver);
+}
+
+static void __exit generic_dpi_panel_drv_exit(void)
+{
+ omap_dss_unregister_driver(&dpi_driver);
+}
+
+module_init(generic_dpi_panel_drv_init);
+module_exit(generic_dpi_panel_drv_exit);
+MODULE_LICENSE("GPL");
--
1.7.1
More information about the linux-arm-kernel
mailing list